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Fix cpu hotplug atomic sleep issue

Description

Fix cpu hotplug atomic sleep issue

We move the spinlock unlock before the thread creation. This should be
safe because the thread creation code doesn't actually manipulate any
taskq data structures; that's done by the thread once it's created.

We also remove the assertion that the maxthreads is the current threads
plus one; that assertion could fail if multiple hotplug events come in
quick succession, and the first new taskq thread hasn't had a chance to
start processing yet.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Matthew Ahrens <mahrens@delphix.com>
eviewed-by: Tony Nguyen <tony.nguyen@delphix.com>
Signed-off-by: Paul Dagnelie <pcd@delphix.com>
Closes #12714

Details

Provenance
pcd_delphix.comAuthored on Nov 2 2021, 4:23 PM
GitHub <noreply@github.com>Committed on Nov 2 2021, 4:23 PM
Parents
rG321c1b6f3974: Disable normalization implicitly when setting "utf8only=off"
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